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was responsible, but this cannot be proved without more detailed
studies."
"Even the highest levels recorded were however lower than
those found in central London or in the industrial towns of the
north at the same time of year, and were about the same as
those in several other London suburbs."
"All concentrations were very low, and it is safer to rely
on the consistency of relationships between results than upon
the rather small differences between actual values."
The two temporary sites referred to in the first line of
the report were situated in the rear garden of No. 31 Bath Road
(south side) and in a builder's yard adjoining the perimeter
track of the Airport and very close to Runway No. 1.
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